/* ===== 重庆亚玛建筑工程有限公司 — 站点样式 =====
   设计语言：工程蓝图 / 施工图纸美学
   主色：蓝图藏青 + 混凝土灰 + 安全警示橙
=================================================== */
:root{
  --ink:#141c26;         /* 蓝图藏青（近黑） */
  --steel:#2c4256;       /* 钢蓝灰 */
  --steel-light:#456278;
  --concrete:#eae7e0;    /* 混凝土暖灰（页面底色） */
  --paper:#f7f5f0;       /* 图纸纸白（卡片底色） */
  --line:#c9cabf;        /* 图纸细线 */
  --line-dark:#9a9a8e;
  --accent:#ff6a1a;      /* 安全警示橙 */
  --accent-dark:#d9550f;
  --brass:#a9884f;       /* 黄铜/钢筋色，用于点缀 */
  --text:#1c2530;
  --text-mute:#5c6672;
  --white:#ffffff;
  --font-display:'Oswald','Microsoft YaHei','PingFang SC',sans-serif;
  --font-body:'PingFang SC','Microsoft YaHei',Arial,sans-serif;
  --font-mono:'Roboto Mono','Consolas',monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);background:var(--concrete);color:var(--text);line-height:1.7;font-size:15px}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
.container{max-width:1360px;margin:auto;padding:0 28px}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}

/* ---- 图纸网格背景 工具类 ---- */
.blueprint-bg{
  background-color:var(--ink);
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:34px 34px;
}
.crop-corners{position:relative}
.crop-corners::before,.crop-corners::after,
.crop-corners b.cc1,.crop-corners b.cc2{content:"";position:absolute;width:14px;height:14px;pointer-events:none}
.crop-corners::before{top:-1px;left:-1px;border-top:2px solid var(--accent);border-left:2px solid var(--accent)}
.crop-corners::after{bottom:-1px;right:-1px;border-bottom:2px solid var(--accent);border-right:2px solid var(--accent)}

/* ================= Header ================= */
.topbar{background:var(--ink);color:#c7cdd3;font-size:12.5px}
.topbar-inner{max-width:1360px;margin:auto;padding:7px 28px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:6px}
.topbar a{color:#c7cdd3}
.topbar-inner .hotline{color:var(--accent);font-family:var(--font-mono);font-weight:700;letter-spacing:.5px}

.header{background:var(--paper);border-bottom:1px solid var(--line-dark);position:sticky;top:0;z-index:20}
.header-inner{max-width:1360px;margin:auto;display:flex;align-items:center;gap:22px;padding:16px 28px}
.logo{display:flex;align-items:center;gap:13px}
.logo-badge{width:52px;height:52px;background:var(--ink);color:var(--accent);display:flex;align-items:center;justify-content:center;font-family:var(--font-display);font-size:20px;font-weight:700;letter-spacing:1px;position:relative;flex:none}
.logo-badge::after{content:"";position:absolute;inset:4px;border:1px solid rgba(255,106,26,.5)}
.logo-name{font-family:var(--font-display);font-size:21px;font-weight:600;color:var(--ink);letter-spacing:.5px;line-height:1.25}
.logo-name em{font-style:normal;color:var(--accent)}
.logo-sub{font-size:11.5px;color:var(--text-mute);font-family:var(--font-mono);letter-spacing:1.5px;text-transform:uppercase;margin-top:2px}
.nav{display:flex;gap:2px;margin-left:auto}
.nav a{padding:10px 18px;font-weight:600;font-size:15px;color:var(--text);position:relative;white-space:nowrap}
.nav a.active,.nav a:hover{color:var(--accent-dark)}
.nav a.active::after{content:"";position:absolute;left:18px;right:18px;bottom:4px;height:2px;background:var(--accent)}
.header-cta{flex:none;background:var(--accent);color:#fff;font-weight:700;padding:11px 20px;font-size:14px;white-space:nowrap}
.header-cta:hover{background:var(--accent-dark)}
.nav-toggle{display:none}

/* ================= Hero ================= */
.hero{position:relative;min-height:520px;display:flex;align-items:flex-end;color:#fff;
  background:linear-gradient(180deg,rgba(20,28,38,.55) 0%,rgba(20,28,38,.86) 78%,var(--ink) 100%),
  url('https://images.unsplash.com/photo-1684497404598-6e844dff9cde?auto=format&fit=crop&w=1900&q=80') center/cover;
}
.hero-inner{max-width:1360px;margin:auto;padding:120px 28px 56px;width:100%}
.hero-eyebrow{font-family:var(--font-mono);color:var(--accent);letter-spacing:3px;font-size:13px;margin-bottom:18px;display:flex;align-items:center;gap:10px}
.hero-eyebrow::before{content:"";width:34px;height:2px;background:var(--accent)}
.hero h1{font-family:var(--font-display);font-size:52px;font-weight:600;line-height:1.22;max-width:760px;letter-spacing:.5px}
.hero p{margin-top:18px;font-size:17px;max-width:560px;color:#dfe3e7}
.hero-actions{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 26px;font-weight:700;font-size:15px;border:2px solid transparent;cursor:pointer}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark)}
.btn-outline{border-color:rgba(255,255,255,.55);color:#fff}
.btn-outline:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:var(--steel)}

/* dimension-line 分隔条：施工图纸中的标注线意象 */
.dim-strip{background:var(--ink);border-top:1px solid rgba(255,255,255,.12)}
.dim-inner{max-width:1360px;margin:auto;display:grid;grid-template-columns:repeat(4,1fr);}
.dim-item{padding:26px 28px;border-left:1px solid rgba(255,255,255,.14);color:#fff;position:relative}
.dim-item:first-child{border-left:0}
.dim-item .num{font-family:var(--font-mono);font-size:30px;font-weight:700;color:var(--accent)}
.dim-item .lbl{font-size:12.5px;color:#aab2ba;margin-top:6px;letter-spacing:.5px}

/* ================= 通用 section ================= */
.section{max-width:1360px;margin:auto;padding:76px 28px}
.section.tight{padding:56px 28px}
.sheet-label{font-family:var(--font-mono);font-size:12.5px;letter-spacing:2px;color:var(--accent-dark);display:flex;align-items:center;gap:10px;margin-bottom:14px}
.sheet-label::before{content:"";width:22px;height:2px;background:var(--accent-dark)}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:38px;flex-wrap:wrap}
.section-head h2{font-family:var(--font-display);font-size:34px;font-weight:600;color:var(--ink)}
.section-head p{color:var(--text-mute);margin-top:8px;max-width:520px;font-size:14.5px}
.section-more{font-weight:700;color:var(--accent-dark);white-space:nowrap;font-size:14px}
.section-more:hover{text-decoration:underline}
.section-dark{background:var(--ink);color:#fff}
.section-dark .sheet-label{color:var(--accent)}
.section-dark .section-head h2{color:#fff}
.section-dark .section-head p{color:#aab2ba}

/* ================= 业务范围卡片 ================= */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line-dark);border:1px solid var(--line-dark)}
.svc-card{background:var(--paper);padding:32px 26px;transition:.2s}
.svc-card:hover{background:var(--white);box-shadow:inset 0 3px 0 var(--accent)}
.svc-idx{font-family:var(--font-mono);color:var(--line-dark);font-size:13px;margin-bottom:16px}
.svc-icon{width:46px;height:46px;border:2px solid var(--ink);display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:18px}
.svc-card h3{font-family:var(--font-display);font-size:19px;font-weight:600;margin-bottom:10px;color:var(--ink)}
.svc-card p{font-size:13.8px;color:var(--text-mute)}
.svc-card a.more{display:inline-block;margin-top:14px;font-size:13px;font-weight:700;color:var(--accent-dark)}

/* ================= 工程案例卡片 ================= */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.case-card{background:var(--paper);border:1px solid var(--line-dark);position:relative;transition:.2s}
.case-card:hover{transform:translateY(-4px);box-shadow:0 14px 28px rgba(20,28,38,.16)}
.case-media{height:180px;background:linear-gradient(135deg,var(--steel),var(--ink));display:flex;align-items:center;justify-content:center;font-size:44px;color:rgba(255,255,255,.85);position:relative}
.case-tag{position:absolute;top:12px;left:12px;background:var(--accent);color:#fff;font-size:11.5px;font-weight:700;padding:4px 10px;letter-spacing:.5px}
.case-code{position:absolute;bottom:10px;right:12px;font-family:var(--font-mono);font-size:11px;color:rgba(255,255,255,.75)}
.case-body{padding:20px}
.case-body h3{font-family:var(--font-display);font-size:18px;font-weight:600;color:var(--ink);margin-bottom:8px}
.case-meta{display:flex;gap:14px;font-size:12.5px;color:var(--text-mute);font-family:var(--font-mono);flex-wrap:wrap}
.case-desc{font-size:13.5px;color:var(--text-mute);margin-top:10px;height:42px;overflow:hidden}

/* filter tabs（案例列表页） */
.filter-bar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:32px}
.filter-bar a{padding:9px 18px;border:1px solid var(--line-dark);font-size:13.5px;font-weight:600;color:var(--text)}
.filter-bar a.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.filter-bar a:hover:not(.active){border-color:var(--accent)}

/* ================= 资质 / 优势条 ================= */
.badge-strip{background:var(--paper);border-top:1px solid var(--line-dark);border-bottom:1px solid var(--line-dark)}
.badge-inner{max-width:1360px;margin:auto;display:grid;grid-template-columns:repeat(4,1fr);}
.badge-item{padding:26px 24px;border-left:1px solid var(--line-dark);display:flex;gap:14px;align-items:center}
.badge-item:first-child{border-left:0}
.badge-icon{width:38px;height:38px;border:2px solid var(--ink);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;flex:none;font-family:var(--font-mono)}
.badge-item b{display:block;font-size:14.5px;color:var(--ink)}
.badge-item span{font-size:12.5px;color:var(--text-mute)}

/* ================= CTA band ================= */
.cta-band{background:var(--accent);color:#fff}
.cta-inner{max-width:1360px;margin:auto;padding:46px 28px;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.cta-inner h2{font-family:var(--font-display);font-size:26px;font-weight:600}
.cta-inner p{margin-top:6px;font-size:14px;color:rgba(255,255,255,.9)}

/* ================= Footer ================= */
.footer{background:var(--ink);color:#aab2ba;padding:56px 0 0}
.footer-inner{max-width:1360px;margin:auto;padding:0 28px;display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:36px}
.footer h3{color:#fff;font-family:var(--font-display);font-weight:600;font-size:16px;margin-bottom:16px;letter-spacing:.5px}
.footer p,.footer a{font-size:13.5px;margin-bottom:9px;display:block;color:#aab2ba}
.footer a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:40px;padding:20px 28px;font-size:12.5px;color:#7c8792;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;max-width:1360px;margin-left:auto;margin-right:auto}

/* ================= 面包屑 & 内页通用 ================= */
.page-hero{background:var(--ink);color:#fff;padding:52px 28px 34px}
.page-hero-inner{max-width:1360px;margin:auto}
.breadcrumb{font-size:13px;color:#9aa3ac;margin-bottom:10px;font-family:var(--font-mono)}
.breadcrumb a{color:#c7cdd3}
.page-hero h1{font-family:var(--font-display);font-size:34px;font-weight:600}
.page-hero p{color:#aab2ba;margin-top:8px;max-width:600px;font-size:14.5px}

.panel{background:var(--paper);border:1px solid var(--line-dark);padding:32px}

/* ---- 关于我们 ---- */
.about-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:start}
.about-grid h2{font-family:var(--font-display);font-size:28px;color:var(--ink);margin-bottom:16px}
.about-grid p{color:var(--text-mute);margin-bottom:14px;font-size:14.5px}
.fact-list{border:1px solid var(--line-dark);background:var(--paper)}
.fact-row{display:flex;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line)}
.fact-row:last-child{border-bottom:0}
.fact-row span:first-child{color:var(--text-mute);font-size:13.5px}
.fact-row span:last-child{font-weight:700;color:var(--ink);font-family:var(--font-mono)}

.timeline{position:relative;padding-left:34px}
.timeline::before{content:"";position:absolute;left:6px;top:6px;bottom:6px;width:2px;background:var(--line-dark)}
.tl-item{position:relative;padding-bottom:36px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:-34px;top:4px;width:13px;height:13px;background:var(--accent);border:3px solid var(--ink)}
.tl-year{font-family:var(--font-mono);font-weight:700;color:var(--accent-dark);font-size:15px}
.tl-item h4{font-size:16px;margin:5px 0 6px;color:var(--ink)}
.tl-item p{font-size:13.5px;color:var(--text-mute)}

.value-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.value-card{border:1px solid var(--line-dark);padding:28px;background:var(--paper)}
.value-card .vi{font-size:26px;margin-bottom:14px}
.value-card h3{font-family:var(--font-display);font-size:18px;margin-bottom:8px;color:var(--ink)}
.value-card p{font-size:13.5px;color:var(--text-mute)}

.cert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.cert-card{border:1px solid var(--line-dark);background:var(--paper);padding:22px 16px;text-align:center}
.cert-card .ci{font-size:28px;margin-bottom:10px}
.cert-card b{display:block;font-size:13.5px;color:var(--ink);line-height:1.5}

/* ---- 业务范围页 流程 ---- */
.process-strip{display:flex;border:1px solid var(--line-dark);background:var(--paper);overflow-x:auto}
.process-step{flex:1;min-width:150px;padding:24px 18px;border-left:1px solid var(--line-dark);position:relative}
.process-step:first-child{border-left:0}
.process-step .pn{font-family:var(--font-mono);color:var(--accent-dark);font-weight:700;font-size:13px}
.process-step h4{font-size:14.5px;margin:10px 0 6px;color:var(--ink)}
.process-step p{font-size:12.5px;color:var(--text-mute)}
.process-step::after{content:"→";position:absolute;right:-11px;top:50%;transform:translateY(-50%);color:var(--line-dark);font-size:16px;z-index:1}
.process-step:last-child::after{display:none}

/* ---- 案例详情 ---- */
.detail-grid{display:grid;grid-template-columns:1.3fr .9fr;gap:38px;align-items:start}
.detail-media{height:380px;background:linear-gradient(135deg,var(--steel),var(--ink));display:flex;align-items:center;justify-content:center;font-size:88px;color:rgba(255,255,255,.85);position:relative}
.detail-info h1{font-family:var(--font-display);font-size:27px;color:var(--ink);margin-bottom:14px}
.spec-list{border:1px solid var(--line-dark)}
.spec-row{display:flex;justify-content:space-between;padding:13px 18px;border-bottom:1px solid var(--line);font-size:13.5px}
.spec-row:last-child{border-bottom:0}
.spec-row span:first-child{color:var(--text-mute)}
.spec-row span:last-child{font-weight:700;color:var(--ink)}
.gallery-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:14px}
.gallery-cell{height:96px;background:var(--concrete);border:1px solid var(--line-dark);display:flex;align-items:center;justify-content:center;font-size:24px;color:var(--line-dark)}

/* ---- 联系我们 ---- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:38px}
.contact-info-row{display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--line)}
.contact-info-row:last-child{border-bottom:0}
.ci-icon{width:40px;height:40px;border:2px solid var(--ink);display:flex;align-items:center;justify-content:center;flex:none;font-size:17px}
.ci-text b{display:block;font-size:14px;color:var(--ink);margin-bottom:3px}
.ci-text span{font-size:13.5px;color:var(--text-mute)}
.map-box{height:100%;min-height:220px;background:var(--ink);position:relative;overflow:hidden;
  background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:28px 28px;display:flex;align-items:center;justify-content:center;color:#fff;text-align:center;padding:20px}
.map-pin{font-size:30px;color:var(--accent)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-grid .full{grid-column:1/-1}
.field label{display:block;font-size:13px;font-weight:700;color:var(--ink);margin-bottom:7px}
.field input,.field textarea,.field select{width:100%;border:1px solid var(--line-dark);background:var(--white);padding:12px 14px;font-size:14px;font-family:var(--font-body)}
.field textarea{resize:vertical;min-height:110px}
.form-note{font-size:12.5px;color:var(--text-mute);margin-top:14px}

/* ================= 响应式 ================= */
@media(max-width:980px){
  .nav{position:fixed;top:0;right:-280px;height:100vh;width:280px;background:var(--ink);flex-direction:column;padding:90px 24px 24px;transition:.25s;z-index:30}
  .nav.open{right:0}
  .nav a{color:#fff;padding:14px 6px;border-bottom:1px solid rgba(255,255,255,.08)}
  .nav-toggle{display:block;margin-left:auto;background:none;border:2px solid var(--ink);width:42px;height:42px;font-size:18px;cursor:pointer}
  .header-cta{display:none}
  .hero h1{font-size:36px}
  .dim-inner{grid-template-columns:1fr 1fr}
  .dim-item{border-left:0;border-top:1px solid rgba(255,255,255,.14)}
  .dim-item:nth-child(odd){border-left:0}
  .svc-grid,.case-grid{grid-template-columns:1fr 1fr}
  .badge-inner{grid-template-columns:1fr 1fr}
  .badge-item{border-left:0;border-top:1px solid var(--line-dark)}
  .badge-item:first-child{border-top:0}
  .about-grid,.detail-grid,.contact-grid{grid-template-columns:1fr}
  .value-grid{grid-template-columns:1fr 1fr}
  .cert-grid{grid-template-columns:1fr 1fr}
  .footer-inner{grid-template-columns:1fr 1fr}
  .process-strip{flex-direction:column}
  .process-step{border-left:0;border-top:1px solid var(--line-dark)}
  .process-step:first-child{border-top:0}
  .process-step::after{display:none}
}
@media(max-width:600px){
  .section{padding:48px 18px}
  .container,.header-inner,.hero-inner{padding-left:18px;padding-right:18px}
  .svc-grid,.case-grid,.value-grid,.cert-grid,.footer-inner,.form-grid{grid-template-columns:1fr}
  .hero h1{font-size:30px}
  .hero{min-height:440px}
  .dim-inner{grid-template-columns:1fr 1fr}
  .badge-inner{grid-template-columns:1fr}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .gallery-grid{grid-template-columns:repeat(2,1fr)}
}